91179289277776 has 80 divisors (see below), whose sum is σ = 206840484361728. Its totient is φ = 38120211072000.

The previous prime is 91179289277749. The next prime is 91179289277801. The reversal of 91179289277776 is 67777298297119.

It is a Harshad number since it is a multiple of its sum of digits (82).

It is a self number, because there is not a number n which added to its sum of digits gives 91179289277776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48922201 + ... + 50751751.

Almost surely, 2^{91179289277776} is an apocalyptic number.

It is an amenable number.

91179289277776 is an abundant number, since it is smaller than the sum of its proper divisors (115661195083952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91179289277776 is a wasteful number, since it uses less digits than its factorization.

91179289277776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840460 (or 1840454 counting only the distinct ones).

The product of its digits is 2352442176, while the sum is 82.

The spelling of 91179289277776 in words is "ninety-one trillion, one hundred seventy-nine billion, two hundred eighty-nine million, two hundred seventy-seven thousand, seven hundred seventy-six".